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<div style="padding:10px;background:red;position:relative;float:left">123

    <p style="z-index:9999;position:absolute;top:20px;left:10px;display:none;width:500px;height:400px;background:orange;">456</p>
</div>


<div style="padding:10px;background:red;position:relative;float:left">123

    <p style="z-index:9999;position:absolute;top:20px;left:10px;display:none;width:500px;height:400px;background:orange;">456</p>
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<div style="padding:10px;background:red;position:relative;float:left">123

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